June weather forecast
Vandalia, IL

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Weather in June

The first month of the summer, June, is still a warm month in Vandalia, Illinois, with an average temperature fluctuating between 82.4°F (28°C) and 65.7°F (18.7°C).

Temperature

June's onset witnesses a minor shift in the average high-temperature, moving from a moderately hot 73.6°F (23.1°C) in May to a still warm 82.4°F (28°C). June witnesses an average low-temperature hovering around a comfortable 65.7°F (18.7°C).

Heat index

June's average heat index is appraised at a tropical 89.6°F (32°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.
Remember that heat index calculations are made for conditions in the shade with light wind. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.

Humidity

The average relative humidity in June in Vandalia, Illinois, is 78%.

Rainfall

The month with the most rainfall is June, when the rain falls for 17.2 days and typically aggregates up to 4.57" (116mm) of precipitation.

Snowfall

In Vandalia, snow does not fall in May through October.

Daylight

With an average of 14h and 54min of daylight, June has the longest days of the year in Vandalia.
On the first day of the month, sunrise is at 5:32 am and sunset at 8:16 pm. On the last day of June, in Vandalia, Illinois, sunrise is at 5:34 am and sunset at 8:25 pm CDT.

Sunshine

June has the most sunshine of the year in Vandalia, with an average of 10.3h of sunshine.

UV index

The months with the highest UV index in Vandalia, Illinois, are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during June leads to these instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
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Frequently asked questions

How hot does it get in Vandalia in June?

The high-temperature during June is 82.4°F (28°C) and the low-temperature is 65.7°F (18.7°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in June is appraised at 89.6°F (32°C).

What is the average humidity in June in Vandalia?

In Vandalia, Illinois, the average relative humidity in June is 78%.

What is the wettest month in Vandalia?

The month with the most rainfall in Vandalia is June, when the rain falls for 17.2 days and typically aggregates up to 4.57" (116mm) of precipitation.

How much does it rain in Vandalia in June?

In Vandalia, in June, it is raining for 17.2 days, with typically 4.57" (116mm) of accumulated precipitation.

When it does not snow in Vandalia?

In Vandalia, snow does not fall in May through October.

When are the longest days in Vandalia?

June has the longest days of the year in Vandalia, with an average of 14h and 54min of daylight.

How many hours of daylight does Vandalia have in June?

In June, the average day length in Vandalia is 14h and 52min.

When is the sunrise / sunset in June in Vandalia?

In June, on the first day of the month, sunrise is at 5:32 am and sunset at 8:16 pm. On the last day of the month, in Vandalia, Illinois, sunrise is at 5:34 am and sunset at 8:25 pm CDT.

What month has the most sunshine in Vandalia?

The month with the most sunshine in Vandalia is June, with an average of 10.3h of sunshine.

How many hours of sunshine does Vandalia have in June?

In Vandalia, the average sunshine duration in June is 10.3h.

What is the month with the highest UV index in Vandalia?

The months with the highest UV index in Vandalia are June through August, with an average maximum UV index of 6.

How high is the UV index in June in Vandalia?

In June, the average daily maximum UV index in Vandalia, Illinois, is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Vandalia, IL

Average temperature in June - Vandalia, IL
  • Average high temperature in June: 82.4°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in June: 65.7°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in June
Vandalia, IL

Average pressure in June - Vandalia, IL
  • Average pressure in June: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in June
Vandalia, IL

Average wind speed in June - Vandalia, IL
  • Average wind speed in June: 7mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in June
Vandalia, IL

Average humidity in June - Vandalia, IL
  • Average humidity in June: 78%

The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in June
Vandalia, IL

Average rainfall in June - Vandalia, IL
  • Average rainfall in June: 4.57"

The wettest month (with the highest rainfall) is June (4.57").
The driest month (with the least rainfall) is February (2.01").

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Average rainfall days in June
Vandalia, IL

Average rainfall days in June - Vandalia, IL
  • Average rainfall days in June: 17.2 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (9.2 days).

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Average snowfall in June
Vandalia, IL

Average snowfall in June - Vandalia, IL
  • Average snowfall in June: 0"

The month with the highest snowfall is December (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in June
Vandalia, IL

Average snowfall days in June - Vandalia, IL
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in June /
Average sunshine in June
Vandalia, IL

Average daylight in June / Average sunshine in June - Vandalia, IL
  • Average daylight in June: 14h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in June: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in June
Vandalia, IL

Average sunshine days in June - Vandalia, IL
  • Average sunshine days in June: 9.3 days

The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is July (8.6 days).

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Average UV index in June
Vandalia, IL

Average UV index in June - Vandalia, IL
  • Average UV index in June: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in June
Vandalia, IL

Average cloud cover in June - Vandalia, IL
  • Average cloud cover in June: 30

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July and September (Cloud cover 30).

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Average visibility in June
Vandalia, IL

Average visibility in June - Vandalia, IL
  • Average visibility in June: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Vandalia, Illinois, USA

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